Excavating machine



M. E. PUGH BXCAVATING MACHINE Filed Jan. 27. 1923 3 Sheets-5heet 1 IN VEN TOR.

April 1 1924. v 1,439,042

r M. E. PUGH EXCAVATING MACHINE Filed Jan. 27 1925 3 Sheets-Sheet 2 P 0 i I IO: :0-

W I} to @v A INVENTOR.

:"April 1 1924.

' M. E. PUGH EXCAVATING MACHINE Filed Jan. 27 3 Sheets-Sheet 5 INV TOR.

Patented Apr. 1, 1924.

MORTd-N E. PUGH, OF CHICAGO, ILLINOIS.

PATENT OFFICE.

EX CAVATING MACHINE.

Application filed zanuary'et', 1923. Serial No. 615,227.

T all whom itmay concern:

Be it known that I, MoRToN E. PUGH,

a citizen of the United States, residing at Chicago, in the county of Cook and State of 6 Illinois, have invented certain new and use- .ful Improvements in Excavating Machines,

of which the following is a specification.

The invention-relates to excavating machines, and has among its various objects the provision of a construction of this character in which the bucket may be moved 'and releasably held in eithera digging or dumping position.

It is an additional object of the invention to provide a bucket having means for engaging the material in the bucket-and causing it to be discharged from the bucket.

It is a. further object to provide a machine of this character whereby the locking and releasing of the bucket may be controlled from the platform of the machine.

It is an added object to provide a locking mechanismcapable of performing the above advantage which is operable toreleasably lock the bucket in any of its various positions.

It is a feature of the invention to providea bucket with a pivotal connection whereby it may be moved and releasably locked in any of its various positions.

. In addition it is an object to provide a frictional locking means for the bucket.

A further object of the invention is the provision of a bucket having means for causing the contents of the bucket to be discharged therefrom, which means is operable upon the opening or discharging operation of the bucket.

It is another object to emplOythemeans for causing the discharge of the material from the bucket as a bail to which the drag line of the bucket may be attached.

It is a further object to provide a lock for the bucket which is operableeither from the platform of the machine or from a position remote from the platform or in proximity .to the bucket.

The invention will be explained and more readily understood when read in conjunction with the accompanying drawings, in which one embodiment of which the invention is susceptible. is disclosed, it being obvious that changes and modifications may be resorted to without departing from the spirit of the appended claims forming a part hereof.

In the drawings,

Fig. 1 is a side elevation of an excavating machine showing the boom and bucket in a raised and lowered position.

Fig. 2 is a view of a fragment of the boom employed in the machine, having one of the channel irons which enters into the construction of the boom, removed, illustrating the arrangement employed for lock ing the bucket in various positions with relationto the boom.

Fig. 3 is a side elevation of a slide bar employed in the construction illustrated in Fig. 2.

Fig. 4 is an enlarged sectional view taken on line 4-4 of Fig. 2.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 2, the slide bar illustrated in Fig. 3 being omitted.

Fig. 6. is a sectional view taken on line 6-6 of Fig. 2, a portion of the structure being shown in elevation.

Fig. 7 is a side elevation of a druin and brake therefor employed in the structure.

Fig. 8 is a planview of the structure shown in Fig. 7

Fig. 9 is a side elevation of a bucket which may be employed in connection with the structure illustrated in Fig. 1.

Fig. 10 is a view similar to Fig. 9, shh wing the elements in a discharging position.

Fig. 11 is a plan view of the elements forming the bottom of the bucket illustrated in Figs. 9 and 10.

' l g. 12 is an elevation of the upper portion of an arm which extends from the bucket.

Fig. 13 is an end elevation looking towards the mouth of the bucket.

Fig. 14 is aside elevation of a modified construction of bottom for the bucket, which may be employed.

Figs. 15 and. 16 are views showing a modified construction of bucket; and Fig. 17 is a fragment of the end of the bucket opposite its discharging end showing the spring actuated latch member.

The structure contemplates the use of a platform 20 which is rotatably mounted upon a truck 21 which may be of any suitable construction. A boom 22 is pivotally secured as at 23 to the platform so that it may assume the positions of the boom illustrated in Fig. 11,- or intermedlate positions. The platform has secured to it an engine or other motive power, and the drum 24, and. also the drum'25. The purpose and advanare mounted to slide with relation to the boom 22 and to be releasably locked with respect to said boom. The outermost end of the boom 22 is provided with. a sheave 31, over which rides a cable 32, one end of which is secured to the arm 27 of the bucket and has its opposite end connected to a suitable clamp 33, from which extends a relatively short cable 34 which has its opposite end secured at 35 to the boom. This last named cable is provided to limit the-motion imparted to the cable 32 and to assist in carrying the load of the boom when the latter is raised or lowered.

Cable connections 36 are employed, which are let off and wound upon the drum 24, depending upon whether the boom is to be raised or lowered. Another cable connection 37 is-employed, which extends from the latch 38 of the bucket over the sheaves 39, 40, 41, and the drum 42, the latter of which is secured to the platform 20 through the medium of the frame 43.

The cable connection 37 is connected to the arm or lever 44, which controls the means for locking the slidable bars generallydesignated 30, to the channel bars forming the boom 22. The slidable bars generally designated 30 are slidably arranged in guideways 45, and 46, which are respectively secured to the channel bars 47 and 48, which enter into the construction of the boom. Each of these bars is provided with a downwardly projecting arm 49 to which the link 29,-which is secured to the arm 27, is pivotally secured.

The sliding bars 30 extend so that they will be in position to be engaged by a locking mechanism clearly illustrated in Fig. 4, the locking mechanism being operable to frictionally engage the sliding bars 30 and hold them in any of their various positions with relation to the boom. ,This locking mechanism includes a lever 44, which is fixedly secured to the rotatable shaft 50. The opposite ends of the shaft are respectively provided with a right and left hand thread, as indicated at 51 and 52. Nuts 53 and 54 are arranged at the respective ends ofthe shaft 50, and in turn, engage the friction shoes respectively designated 55 and 56, which are designed to engage the slidable bars 3030 and hold them in frictional contact with the channel bars 47 and 48 of the boom.

It is evident that as the arm 44 is moved in one direction, the nuts 53 and 54 will be caused to exert a pressure upon the shoes 55 and 56, which pressure will be transmitted to the bars, causing them to be held in one of the various positions. It is also manifest that as its arm 44 is moved in the opposite direction, that the pressure will be released, which will permit the slidable bars 3030- to be freely moved with relation to the boom.

To cause the release of the frictional looking means which locks the slidable bars to the boom, a weight 37 is secured to the line 37 between the sheaves 39 and 40 which will cause the arm 44 to be moved and release the clamping or locking means. ,The latter member 38 is provided with a spring 38 so that itwill assume a position in which it may engage with the latching element 72 carried by the bottom 69 of the bucket when the weight will-cause the release of the holding mechanism. As before stated, the cable 37 extends to and isgconnected to the element generally designated 25, mounted on the platform 20. This element includes two connected drums respectively designated 42 and 58, and the brake drum- 59. The cable 37 is adapted to be wound upon the drum 42, the latter of which is actuated in one direction through the medium of the foot pedal 59 to which a cable 60 is attached, the latter of which extends partly around the drum 58 and is secured thereto at 58*. The cable 37 passes from the drum 42 to and over thepulley 61, and has a weight 62 applied thereto. It is evident that by applying pressure to lever 59 the drum 58 will be caused to rotate thereby causing rotation of ,the drum 42, thus weighing thereover the cable 37, the slack of which will be taken up by the weight 62. I

eludes the pivoted element 67 which is designed to cooperate with the holding element 68, the latter of which is secured to theglever. It is manifest that this arrangement just explaine will provide an efficient arrangement for controlling the arm 44 and consequently the locking mechanism actuated upon the operation of this arm.

The bucket 26 is designed 'so that it is operable to scoop the material to be excavated, hold it Within the bucketuntil the boom is arranged at the desired position, and is further designed so that the matter contained therein may be discharged therefrom through the medium of a mechanism which is operable either from the platform of the machine or from a position remote therefrom. The construction of this bucket is such that, the material contained therein is acted upon by an element which causes the material to be forced therefrom upon the opening of the bucket. This construction is such that it may be readily manipulated to cause any material which may adhere to the bucket, to be removed therefrom after the elements have been arranged to permit the discharge of the material from the bucket.

To produce the above advantage, the bucket 26 is provided .with an openable bottom 69 which is pivotally secured to the bucket at 70 and includes the teeth 71, the latch 72 which is designed to cooperate With the element 38 to releasably lock the bottom with relation to the bucket. The bottom 69 is further provided with the arms 72 and 7 3 which are arranged so that when the bottom 69 is released, these arms will move inwardly with respect to the bucket 26 which will act to shear the material from the interiorof the bucket should any adhere thereto and insure its separation therefrom, which will permit the material to be readily discharged from the bucket when the bottom 69 is arranged to permit of this. These arms 72 and 73 are connected together by means of an element 74 which will provide a bail to which the drag line 75 may be attached. This element 74 will cause a pressure to be applied to t is material within the bucket 26 .and also cooperate to cause the discharge of the material contained in the bucket. The drag line 75 extends from the bail 74- around the sheaves 76 and 77 and thence to a drum mounted upon the platform 20.

The position of the bottom 69 and the arms 72, T3 and the element 74, is clearly shown in Fig. 10, when these elements are arranged to permit the discharge of the material contained in the bucket, from which it will be clearly evident that the elements 72 and 753 will cause any material which may tend to adhere to the sides of the bucket to be sheared therefrom, andthe pressure to be exerted upon the material by the element forming the bail 74, which will insure the discharge of the material from the bucket.

In the structures illustrated in Figs. 15 and 16, a slightly modified arrangement is contemplated, in which the elements similar to 72 and 7 3 are provided with a chain connection 78 and 79, which are connected to It is also evident that the bucket may be causedto discharge its contents from an arrangement provided upon the platform or by a person positioned alongside of the machine, this last named advantage being at tained by the use of a cable or rope 57 which is secured to the element 38 which forms part of the latch for holding the bottom in its closed position.

It is further apparent that. by the use of my improvements, the bucket can be locked and held in any predetermined position, for digging or dumping, without interfering with the raising or lowering of the boom, and that this operation may be performed by the operator from his position on the machine or by a person standing on the ground alongside of the machine.

Furthermore, by my improvements, it is obvious that a bucket is provided, the bail members of which are located on the inside of the bucket so as not to strike or'rub against the walls of a ditch or trench in the operation of digging the same, and that the cutters or side pieces 82 at that end of the bucket near which the bottom is pivoted, will provide means for cutting off the sides of the ditch or trench so as to give proper clearance for the passage of the bucket;

It is further apparent that by my impl oven'ients abucket having an improved bottom, mouthpiece and bail, consisting of one or more elements. forming a single unit, allmoving together under the control of the pulling members. is provided, which will enable the operator to close the bottom while changing the bucket from its dun'lping to digging position, and that a bottom is pro vided which can be rapidly opened and closed with a blow of suflicient force to jar loose any remaining or sticking material from the sides or bottom of the bucket, it being evident that an advantage of the above mentioned construction oft-he bucket, is the loading bail or members being'located on the inside of the bucket, the sides and top will assist in discharging the contents as said members swing inwardly.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent ,is-

1. In an excavating machine, the combination of a boom, a bucket secured for movement with relation to the boom. means for releasably locking said'bucket relatively to the boom, said means including a member connected with the bucket and movable lengthwise of the boom, and means for frictionally engaging said member.

.2. In an excavating machine, the combination of a boom, an arm having a bucket said arm being secured with relation to the j boom and means carried bythe boom for releasably loekin'gsaid arm relatively to the boomand a support for the arm whereby theweight of the bucket is carried by the I boom when the locking means is released.

bucket'toward said digging position, and

saidcable providing means for moving the boom.

I 5. In an excavating machine, the combination of a boom, a bucket secured for move ment with relation to the boom and expansible means for locking said bucket rela- -.tively to the boom, said last mentioned means being contractable to release the bucket and being operable from the platform of said excavating machine.

1 6. In a machine of the character described the combination of a boom, a bucket, a slidable member providing a connection between the bucket and the boom and means for actuating the connection to grip said slidable member and thereby releasablylock said member relatively to the boom.

7. In a machine of the character described, the combination of a boom, an arm pivoted to the boom, a bucket secured to the arm, a cable secured to the arm, said cable.

providing means for moving the arm and bucket to digging position and having means for limiting the movement of the arm and bucket toward said digging position.

8. In a machine of the character described the combination of a boom, an arm pivotally secured to the boom, a bucket secured to the arm, a closure for the bucket, a slidable connection between said arm and the boom and means for actuating the connection ;to'lock the arm relatively to the boom, and means connected with said closure .and said actuating means forreleasing said locking means and actuating the closure.

9. In a machine of the character'described the combination of a boom, an arm pivotally connected therewith, a bucket secured to the arm, a member extending between the arm.

bucket, means for frictionally engaging the slidable member, and holding said bucket in Various angular positions relatively to the boom.

11. In a device of the character described the combination of a boom, an arm secured to the'boom, a bucket secured to the arm, a slidable element and a link extending between the boom and the arm, and means for locking said slidable element with relation to the boom to thereby hold said arm and bucket in various angular positions relatively to the boom.

12. In an excavating machine the combination of a drag. bucket having a pivoted bottom, a bail connected at-the axis of and movable with the pivoted bottom, and means for engaging said bottom to releasably lock the bottom of said bucket in a closed position.

13. In a device of the character described the combination of a boom, an arm secured to the boom to swing relatively to said boom, a member extending between the arm and the boom, a support for said member said support being secured to the boom and permitting the member to -move relatively to the boom and means for holding said member in relatively different positions with respect to the boom, saidmeans being engageable with a portion of said member.

14. In an excavating machine the combination of a bucket adapted to be opened to permit said ,bucket to be discharged and means carried by the bucketarranged to act upon the, material contained in said bucket to cause said material to be discharged therefrom.

15. In an excavating machine the combination of a bucket adapted to be opened to permit said bucket to be discharged and said bucket having pivoted means arranged to act upon the material contained in said bucket ,to cause said material to be discharged therefrom.

16. In an excavating machine the combination of a bucket adapted to be opened to permit said bucket to be discharged and means arranged interiorly of the bucket and to act upon the material contained in said bucket to cause said material to be discharged therefrom 17. In an excavating machine the combitherefrom and means pivoted to the wall of said bucket for engaging the material, to cause the material to be discharged therefrom. v

19. In an excavating machine the combination of a' bucket a Wall-thereof being operable to permit the dischar e of material therefrom and means secure to said wall for engaging said-material to cause the ma terial to be discharged therefrom.

20. In an excavating machine the combination of a bucket a wall thereof bein operable to permit the discharge of materia therefrom, means connected to said wall for moving said wall to close the bucket, said means being operable to engage the material in said bucket to cause its discharge from the bucket upon the opening of sad bucket.

, 21. In an excavating machine the combination of a bucket a wall thereof being operable to cause the bucket to be opened and closed, said bucket having means to which a member for moving-the bucket may be attached, said means being operable to engage the material in said bucket to cause 1t to be discharged therefrom upon the opening of said bucket. i

22. In an. excavating machine the combination of a bucket a wall-thereof being operable to cause the bucket to be opened and closed, said bucket having means to which a member for moving the bucket may be attached, said means being secured to said wall and being operable to engage the material in said bucket. to cause' it to be discharged therefrom upon. the opening of said bucket.

23. In an excavating machine the combination of a bucket a wall thereof bein pivoted to permit the bucket to Joe opene and closed, said bucket having means to which a member for moving the bucket may be attached, said means being operable to engage the material in said bucket to cause it to be discharged therefrom upon the opening of said bucket.

24. In a machine of the character described having an excavating bucket one wall thereof being operable to be opened and clos'ed,-a bail secured to said wall, the

sides of said bail being arranged in proximity to the sides of said bucket and being operable to engage and cause the material in said bucket to be discharged therefrom.

25. In a machine of the character de scribed the combination of a bucket a wall thereof being operable to be opened and closed, a member secured to said wall, said member havmg portlons WlllOh are arran ed in proximity to the side walls-of the buc et and having a portion Which extends across the bucket, said member cooperating to cause the discharge of material from the bucket upon the opening of said bucket.

26. In a machine of the character described having a relatively movable boom and a bucket, the combination of means for moving said boom and means cooperatively connected to said means. for moving the boom whereby said bucket may be moved with relation to the boom.

27. In a machine of the character described, the combination with a bucket havunder the control of pulling means, said pulling means connected to said bail whereby the operatorwill be enabled to close the door While changing the bucket from dumping to digging osition.

28. In a mac line of the class described, the combination with a bucket having an opening in its bottom and one of its ends open, of means to close said bottom openin comprising a door, a mouth-piece and a bai consisting of one or more elements united to form asingle unit pivotally mounted near the open end of the bucket and all adapted to be moved together under the control of pulling means, said pulling means connected to said bail whereby the-operator will be enabled to close the door with a blow of suflicient forceto jar loose material adherin to the sides or bottom of the bucket.

29; n 'a, machine of the character described, the combination of a boom, an arm pivoted to the boom, a bucket secured to the arm, a cable secured to the arm, said cable providing means for moving the arm and bucket to digging position and having means for limiting the movement of the armand bucket toward said digging position, and said cable providing means for moving said boom.

MORTON E. vPUGrH. 

